I can confirm this but I can also confirm:
PC with Roon --> HDMI --> UDP-205 --> HDMI out: 7.1 Supported (actually 5.1 in my case).
I can also confirm that (using JRMC)
PC --> DLNA --> UDP-205 --> HDMI out: 7.1 Supported (actually 5.1 in my case) but, more interestingly, PC --> DLNA --> UDP-205 --> HDMI out: 7.1 DSD Supported
Screenshot of MCH DSD playback via Oppo/Marantz
Oppo display showing DSD input
Marantz display showing multichannel (5.1) DSD input